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TELEDYNE INSTRUMENTS
460L Instruction Manual Maintenance
05228 Rev B 45
DCN 5164 PRINTED DOCUMENTS ARE UNCONTROLLED
9. MAINTENANCE:
9.1. Replacing the Particulate Filter Element
The 460L is equipped with a particulate filter on the ozone inlet. Only Teledyne Instruments filter
elements should be used. When the monitor is first installed, the sample filters should be checked
at least once a week for particulate loading and replaced if necessary. Once the replacement
frequency is determined, a regular schedule for filter replacement should be instituted.
For replacement filter, please contact Teledyne Instruments’ sales department and request part
number 05017.
9.1.1. Filter Replacement Procedure
1. Turn the Monitor off and ensure that the gas delivery line is not under pressure
2. Purge the gas delivery line of ozone.
3. Unscrew the pressure fitting at the top of the filter (Fitting B in Figure 9-1) from the union
fitting.
4. Unscrew the pressure fitting at the bottom of the filter (Fitting C in Figure 9-1) from the
ozone Inlet.
5. Discard the filter.
6. Attach the new filter using the fittings supplied with it.
7. After reassembly, the gas line should be pressurized with oxygen or dry air and checked
for leaks using a bubble solution.
Ozone Inlet
Filter
Pressure Fitting A
Union
Fitting
Pressure
Fitting C
Pressure
Fitting B
Figure 9-1 Changing the Particulate Filter